A highly surfaced, chalk-coated paper introduced for stamp printing purposes in 1902 and still used from time to time. It is designed to deter any attempt at the fraudulent re-use of stamps by making it impossible to clean off the postmark without removing the stamp design as well. Chalky paper can be distinguished from ordinary by touching it with silver, when a dark, pencil-like mark is left. An interesting variant of the idea was the diamond-latticed lines of chalk on the Arms type of Russia of 1909. Stamps of chalky paper should not be immersed in water and great care should be taken when 'floating off'. In catalogues chalky paper is usually indicated by the capital letter 'C'. When the letters 'C-O' appear together, it means the stamp exists on both chalky and ordinary paper.
- R. J. Sutton 6th edition revised by K. W. Anthony
The Stamp Collector's EncyclopaediaPublished 1966Posted January 6, 2000
Editor's Note: Remember this was written before 1966 by an Englishman so it may no longer apply to modern catalogues.
Index of 507 Notes from the Past
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